Choudary, right, and followers arrive at an Islam4UK press conference in London in 2010. Photograph: Rex Features

He will be barred from travelling abroad without permission, his use of the internet and access to mosques will be limited, and he will be subject to periodic visits from police officers.

Licence conditions placed on another radical preacher who was recently released from jail, shared with the Observer, show that he was obliged to reveal all his banking details and to possess only one mobile phone. The man also had to register his car with the police and to avoid association with a number of named individuals.

But some experts on radicalisation questioned whether these measures will be sufficient in Choudary’s case. “He doesn’t believe that the law has any power or jurisdiction over him,” said Haras Rafiq, chief executive of Qulliam, the counter-extremism organisation. “He’s not been de-radicalised: I don’t think he ever will be.

“To his followers, now that he’s been in prison he’s seen as something of a martyr for the cause. Al-Muhajiroun inspired a number of its followers to commit terrorist attacks including the 7/7 bombings and the murder of Drummer Lee Rigby.

Choudary and his co-defendant, Mohammed Rahman, were jailed in 2016 after telling their supporters to obey Abu Bakr al-Baghdadi, the Isis leader and to travel to Syria to support “the caliphate”.

After being proscribed, al-Muhajiroun relaunched itself as al-Ghurabaa, which was also banned under terrorism laws. Successor groups such as Islam4Uk and Muslims Against Crusades were also prohibited.